Which of the following is NOT a factor in determining the relationship between injury and employment?

The choice indicating that the nature of previous non-related injuries is not a factor in determining the relationship between injury and employment is correct because the focus in this determination is on the specific circumstances surrounding the injury that occurred while working.

When assessing the connection between an injury and employment, evaluators consider how the duties performed at the time of injury, the work environment, and the worker's medical history might directly influence the occurrence or aggravation of a condition. Previous injuries that are unrelated hold less significance in establishing this relationship since they do not pertain to the specific employment situation surrounding the current injury.

Therefore, while comprehensive medical histories are vital for understanding a worker's overall health and potential risk factors, unrelated past injuries don't typically influence the direct cause-and-effect relationship necessary for claims related to current employment injuries.